IOC President Thomas Bach, whose schedule included stops in five countries, meetings with world leaders, and seven days championing the importance of sport in society and its ability to spread peace.
The IOC will launch a free, online education service aimed specifically at Olympians, other elite athletes and their coaches.
The IOC has set up a hotline for whistleblowers to report match-fixing and other corruption in a new initiative to protect the integrity and credibility of the Olympics and other sports competitions.
IOC: Toyota Motor Corp. has signed on as a worldwide Olympic sponsor in a long-term deal reportedly worth more than $US800 million ($A1.04 billion).
Demolition work has got underway at the National Stadium in Tokyo with construction of a new state-of-the-art arena for the 2020 Olympics and Paralympics due to begin in October.
Britt back home after World Cup gold
Gallery: Looking back at 2016
Did you know?
Alana Boyd (athletics – pole vault) made Australian Olympic history in Beijing, becoming the first Australian to join both parents as Olympians. This feat was emulated by Jess Fox (canoe/kayak - slalom) at the London 2012 Games.